5m + 6 / 3 = 6x-8 Tolong jawab yaa beserta caranya

5m+6/3 = -48
5m + 2 = -50
5m = - 50 
m  = -10

5m + 6/3 = 6 x -8
5m + 2 = -48
5m = -48 -2
5m = -50
m = -50/5 = -10